20 lines
9.8 KiB
HTML
20 lines
9.8 KiB
HTML
<!DOCTYPE html><html class="default" lang="en" data-base=".."><head><meta charset="utf-8"/><meta http-equiv="x-ua-compatible" content="IE=edge"/><title>fromPixels | @vladmandic/face-api - v1.7.14</title><meta name="description" content="Documentation for @vladmandic/face-api"/><meta name="viewport" content="width=device-width, initial-scale=1"/><link rel="stylesheet" href="../assets/style.css"/><link rel="stylesheet" href="../assets/highlight.css"/><script defer src="../assets/main.js"></script><script async src="../assets/icons.js" id="tsd-icons-script"></script><script async src="../assets/search.js" id="tsd-search-script"></script><script async src="../assets/navigation.js" id="tsd-nav-script"></script><script async src="../assets/hierarchy.js" id="tsd-hierarchy-script"></script></head><body><script>document.documentElement.dataset.theme = localStorage.getItem("tsd-theme") || "os";document.body.style.display="none";setTimeout(() => app?app.showPage():document.body.style.removeProperty("display"),500)</script><header class="tsd-page-toolbar"><div class="tsd-toolbar-contents container"><div class="table-cell" id="tsd-search"><div class="field"><label for="tsd-search-field" class="tsd-widget tsd-toolbar-icon search no-caption"><svg width="16" height="16" viewBox="0 0 16 16" fill="none"><use href="../assets/icons.svg#icon-search"></use></svg></label><input type="text" id="tsd-search-field" aria-label="Search"/></div><div class="field"><div id="tsd-toolbar-links"></div></div><ul class="results"><li class="state loading">Preparing search index...</li><li class="state failure">The search index is not available</li></ul><a href="../index.html" class="title">@vladmandic/face-api - v1.7.14</a></div><div class="table-cell" id="tsd-widgets"><a href="#" class="tsd-widget tsd-toolbar-icon menu no-caption" data-toggle="menu" aria-label="Menu"><svg width="16" height="16" viewBox="0 0 16 16" fill="none"><use href="../assets/icons.svg#icon-menu"></use></svg></a></div></div></header><div class="container container-main"><div class="col-content"><div class="tsd-page-title"><ul class="tsd-breadcrumb"><li><a href="../index.html">@vladmandic/face-api</a></li><li><a href="../modules/tf.html">tf</a></li><li><a href="../modules/tf.browser.html">browser</a></li><li><a href="tf.browser.fromPixels.html">fromPixels</a></li></ul><h1>Function fromPixels</h1></div><section class="tsd-panel"><ul class="tsd-signatures"><li class="tsd-signature tsd-anchor-link"><a id="frompixels" class="tsd-anchor"></a><span class="tsd-kind-call-signature">fromPixels</span><span class="tsd-signature-symbol">(</span><br/> <span class="tsd-kind-parameter">pixels</span><span class="tsd-signature-symbol">:</span><br/> <span class="tsd-signature-symbol">|</span> <span class="tsd-signature-type">HTMLCanvasElement</span><br/> <span class="tsd-signature-symbol">|</span> <span class="tsd-signature-type">HTMLImageElement</span><br/> <span class="tsd-signature-symbol">|</span> <span class="tsd-signature-type">HTMLVideoElement</span><br/> <span class="tsd-signature-symbol">|</span> <span class="tsd-signature-type">ImageData</span><br/> <span class="tsd-signature-symbol">|</span> <span class="tsd-signature-type">ImageBitmap</span><br/> <span class="tsd-signature-symbol">|</span> <span class="tsd-signature-type">PixelData</span><span class="tsd-signature-symbol">,</span><br/> <span class="tsd-kind-parameter">numChannels</span><span class="tsd-signature-symbol">?:</span> <span class="tsd-signature-type">number</span><span class="tsd-signature-symbol">,</span><br/><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">:</span> <a href="../types/tf.Tensor3D.html" class="tsd-signature-type tsd-kind-type-alias">Tensor3D</a><a href="#frompixels" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="../assets/icons.svg#icon-anchor"></use></svg></a></li><li class="tsd-description"><div class="tsd-comment tsd-typography"><p>Creates a <code>tf.Tensor</code> from an image.</p>
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<pre><code class="js"><span class="hl-0">const</span><span class="hl-1"> </span><span class="hl-2">image</span><span class="hl-1"> = </span><span class="hl-0">new</span><span class="hl-1"> </span><span class="hl-3">ImageData</span><span class="hl-1">(</span><span class="hl-4">1</span><span class="hl-1">, </span><span class="hl-4">1</span><span class="hl-1">);</span><br/><span class="hl-5">image</span><span class="hl-1">.</span><span class="hl-5">data</span><span class="hl-1">[</span><span class="hl-4">0</span><span class="hl-1">] = </span><span class="hl-4">100</span><span class="hl-1">;</span><br/><span class="hl-5">image</span><span class="hl-1">.</span><span class="hl-5">data</span><span class="hl-1">[</span><span class="hl-4">1</span><span class="hl-1">] = </span><span class="hl-4">150</span><span class="hl-1">;</span><br/><span class="hl-5">image</span><span class="hl-1">.</span><span class="hl-5">data</span><span class="hl-1">[</span><span class="hl-4">2</span><span class="hl-1">] = </span><span class="hl-4">200</span><span class="hl-1">;</span><br/><span class="hl-5">image</span><span class="hl-1">.</span><span class="hl-5">data</span><span class="hl-1">[</span><span class="hl-4">3</span><span class="hl-1">] = </span><span class="hl-4">255</span><span class="hl-1">;</span><br/><br/><span class="hl-5">tf</span><span class="hl-1">.</span><span class="hl-5">browser</span><span class="hl-1">.</span><span class="hl-3">fromPixels</span><span class="hl-1">(</span><span class="hl-5">image</span><span class="hl-1">).</span><span class="hl-3">print</span><span class="hl-1">();</span>
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</code><button type="button">Copy</button></pre>
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</div><div class="tsd-parameters"><h4 class="tsd-parameters-title">Parameters</h4><ul class="tsd-parameter-list"><li><span><span class="tsd-kind-parameter">pixels</span>: <br/> <span class="tsd-signature-symbol">|</span> <span class="tsd-signature-type">HTMLCanvasElement</span><br/> <span class="tsd-signature-symbol">|</span> <span class="tsd-signature-type">HTMLImageElement</span><br/> <span class="tsd-signature-symbol">|</span> <span class="tsd-signature-type">HTMLVideoElement</span><br/> <span class="tsd-signature-symbol">|</span> <span class="tsd-signature-type">ImageData</span><br/> <span class="tsd-signature-symbol">|</span> <span class="tsd-signature-type">ImageBitmap</span><br/> <span class="tsd-signature-symbol">|</span> <span class="tsd-signature-type">PixelData</span></span><div class="tsd-comment tsd-typography"><p>The input image to construct the tensor from. The
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supported image types are all 4-channel. You can also pass in an image
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object with following attributes:
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<code>{data: Uint8Array; width: number; height: number}</code></p>
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</div><div class="tsd-comment tsd-typography"></div></li><li><span><code class="tsd-tag">Optional</code><span class="tsd-kind-parameter">numChannels</span>: <span class="tsd-signature-type">number</span></span><div class="tsd-comment tsd-typography"><p>The number of channels of the output tensor. A
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numChannels value less than 4 allows you to ignore channels. Defaults to
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3 (ignores alpha channel of input image).</p>
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</div><div class="tsd-comment tsd-typography"></div></li></ul></div><h4 class="tsd-returns-title">Returns <a href="../types/tf.Tensor3D.html" class="tsd-signature-type tsd-kind-type-alias">Tensor3D</a></h4><p>A Tensor3D with the shape <code>[height, width, numChannels]</code>.</p>
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<p>Note: fromPixels can be lossy in some cases, same image may result in
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slightly different tensor values, if rendered by different rendering
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engines. This means that results from different browsers, or even same
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browser with CPU and GPU rendering engines can be different. See discussion
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in details:
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<a href="https://github.com/tensorflow/tfjs/issues/5482">https://github.com/tensorflow/tfjs/issues/5482</a></p>
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<div class="tsd-comment tsd-typography"><div class="tsd-tag-doc"><h4 class="tsd-anchor-link"><a id="doc" class="tsd-anchor"></a>Doc<a href="#doc" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="../assets/icons.svg#icon-anchor"></use></svg></a></h4></div></div><aside class="tsd-sources"><ul><li>Defined in node_modules/.pnpm/@tensorflow+tfjs-core@4.22.0/node_modules/@tensorflow/tfjs-core/dist/ops/browser.d.ts:122</li></ul></aside></li></ul></section></div><div class="col-sidebar"><div class="page-menu"><div class="tsd-navigation settings"><details class="tsd-accordion"><summary class="tsd-accordion-summary"><h3><svg width="20" height="20" viewBox="0 0 24 24" fill="none"><use href="../assets/icons.svg#icon-chevronDown"></use></svg>Settings</h3></summary><div class="tsd-accordion-details"><div class="tsd-filter-visibility"><span class="settings-label">Member Visibility</span><ul id="tsd-filter-options"><li class="tsd-filter-item"><label class="tsd-filter-input"><input type="checkbox" id="tsd-filter-inherited" name="inherited" checked/><svg width="32" height="32" viewBox="0 0 32 32" aria-hidden="true"><rect class="tsd-checkbox-background" width="30" height="30" x="1" y="1" rx="6" fill="none"></rect><path class="tsd-checkbox-checkmark" d="M8.35422 16.8214L13.2143 21.75L24.6458 10.25" stroke="none" stroke-width="3.5" stroke-linejoin="round" fill="none"></path></svg><span>Inherited</span></label></li></ul></div><div class="tsd-theme-toggle"><label class="settings-label" for="tsd-theme">Theme</label><select id="tsd-theme"><option value="os">OS</option><option value="light">Light</option><option value="dark">Dark</option></select></div></div></details></div></div><div class="site-menu"><nav class="tsd-navigation"><a href="../index.html">@vladmandic/face-api - v1.7.14</a><ul class="tsd-small-nested-navigation" id="tsd-nav-container"><li>Loading...</li></ul></nav></div></div></div><footer></footer><div class="overlay"></div></body></html>
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